<template>
	<view class="content">
		<view class="navbar" :style="{ position: headerPosition, top: headerTop }">
			<view class="nav-item" :class="{ current: filterIndex === 0 }" @click="tabClick(0)">综合排序</view>
			<view class="nav-item" :class="{ current: filterIndex === 1 }" @click="tabClick(1)">销量优先</view>
			<view class="nav-item" :class="{ current: filterIndex === 2 }" @click="tabClick(2)">
				<text>价格</text>
				<view class="p-box">
					<text :class="{ active: priceOrder === 1 && filterIndex === 2 }" class="yticon icon-shang"></text>
					<text :class="{ active: priceOrder === 2 && filterIndex === 2 }" class="yticon icon-shang xia"></text>
				</view>
			</view>
			<text class="cate-item yticon icon-fenlei1" @click="toggleCateMask('show')"></text>
		</view>
		<view class="goods-list">
			<view v-for="(item, index) in goodsList" :key="index" class="goods-item" @click="navToGoodsDetail(item)">
				<view class="image-wrapper">
					<image :lazy-load="true" :src="item.image" mode="aspectFill"></image>
				</view>
				<text class="title clamp">{{ item.name }}</text>
				<view class="price-box">
					<text class="price">{{ item.sale_price }}</text>
					<text>已售 {{ item.sales }}</text>
				</view>
			</view>
		</view>
		<uni-load-more :status="loadingType"></uni-load-more>
		
		<view class="cate-mask" :class="cateMaskState===0 ? 'none' : cateMaskState===1 ? 'show' : ''" @click="toggleCateMask">
			<view class="cate-content" @click.stop.prevent="stopPrevent" @touchmove.stop.prevent="stopPrevent">
				<view class="t-box">
					<text @click="closeCate(0)" class="t-b yticon icon-arrow-left-bottom"></text>
					<text class="t">分类</text>
					<text class="t-s"></text>
				</view>
				<scroll-view scroll-y class="cate-list">
					<view v-for="item in cateList" :key="item.id">
						<view class="cate-item-p b-b two" :style="item.id==cateId? 'color:#00aa00': 'color:#555'" @click="changeCate(item.id)">{{item.name}}</view>
						<view class="cate-flow">
							<view v-for="titem in item.child" :key="titem.id" class="cate-item" :class="{active: titem.id == cateId}"
							 @click="changeCate(titem.id)">
								{{titem.name}}
							</view>
						</view>
					</view>
				</scroll-view>
			</view>
		</view>
		

	</view>
</template>

<script>
import uniLoadMore from '@/components/uni-load-more/uni-load-more.vue';
import {isEmpty, isEmptyObj } from '../../utils';	
import { mapState} from 'vuex';
export default {
	components: {
		uniLoadMore
	},
	data() {
		return {
			cateMaskState: 0, //分类面板展开状态
			headerPosition: 'fixed',
			headerTop: '0px',
			loadingType: 'more', //加载更多状态
			filterIndex: 0,
			cateId: 0, //已选三级分类id
			priceOrder: 0, //1 价格从低到高 2价格从高到低
			cateList: [],
			goodsList: [],
			page:1
		};
	},
	computed: {
	},
	onShow() {
		this.loadData('refresh');
		this.loadCateList();
	},
	onLoad(options) {
		// #ifdef H5
		this.headerTop =  '44px';
		// #endif
		this.cateId = options.cid || 0;
		console.log(this.cateId);
		this.loadData('refresh');
		this.loadCateList();
	},
	onPageScroll(e) {
		//兼容iOS端下拉时顶部漂移
		if (e.scrollTop >= 0) {
			this.headerPosition = 'fixed';
		} else {
			this.headerPosition = 'absolute';
		}
	},
	//下拉刷新
	onPullDownRefresh() {
		this.page=1;
		this.loadData('refresh');
	},
	//加载更多
	onReachBottom() {
		if(this.loadingType =='more'){
			this.page+=1;
			this.loadData('add');
		}
		
	},
	methods: {
		//加载分类
		loadCateList(){
			return Promise.all([
				this.$ajax.get('category/tree',{}).then(data=>{
					this.cateList= data.data
					return ;
				})
			])
			.catch(e => {
			});
		},
		
		//加载商品
		loadData(type,loading=0){
			//const hide = this.$loading('数据加载中...');
			if (type === 'add') {
				if (this.loadingType === 'nomore') {
					return;
				}
				this.loadingType = 'loading';
			} else {
				this.loadingType = 'more';
			}
			var param={
				page:this.page,
				category_id:this.cateId,
				store_id:0
			}
			console.log(param);
			if (1===this.filterIndex) {
				param.sort='sale_count'
			}
			if (2===this.filterIndex) {
				if(1===this.priceOrder){
					param.sort='price_top'
				}else{
					param.sort='price_low'
				}
			}
			return Promise.all([
				this.$ajax.get('goods/getbycategory',param).then(data=>{
					let num = data.data.length;
					if (type === 'refresh') {
						this.goodsList = data.data;
					}else{
						this.goodsList = this.goodsList.concat(data.data);
					}
					this.loadingType = num < 6 ? 'nomore' : 'more';
					if (type === 'refresh') {
						if(loading==0){
							uni.stopPullDownRefresh();
						}
						
						
					}
				})
			])
			.catch(e => {
			});
			
		},
		//筛选点击
		tabClick(index) {
			if (this.filterIndex === index && index !== 2) {
				return;
			}
			this.filterIndex = index;
			if (index === 2) {
				this.priceOrder = this.priceOrder === 1 ? 2 : 1;
			} else {
				this.priceOrder = 0;
			}
			uni.pageScrollTo({
				duration: 300,
				scrollTop: 0
			});
			this.loadData('refresh', 1);
		},
		//显示分类面板
		toggleCateMask(type) {
			let timer = type === 'show' ? 10 : 300;
			let state = type === 'show' ? 1 : 0;
			this.cateMaskState = 2;
			setTimeout(() => {
				this.cateMaskState = state;
			}, timer);
		},
		//分类点击
		changeCate(cid) {
			this.cateId = cid;
			this.toggleCateMask();
			uni.pageScrollTo({
				duration: 300,
				scrollTop: 0
			});
			this.loadData('refresh', 1);
		},
		closeCate(status){
			this.cateMaskState = 0;
		},
		//详情
		navToGoodsDetail(item) {
			return uni.navigateTo({
				url: `/pages/product/product?data=${JSON.stringify({
					goods: item
				})}`
			});
		},
		stopPrevent() {}
	}
};
</script>

<style lang="scss">
page,
.content {
	background: $page-color-base;
}
.content {
	padding-top: 96upx;
}

.navbar {
	position: fixed;
	left: 0;
	top: var(--window-top);
	display: flex;
	width: 100%;
	height: 80upx;
	background: #fff;
	box-shadow: 0 2upx 10upx rgba(0, 0, 0, 0.06);
	z-index: 10;
	.nav-item {
		flex: 1;
		display: flex;
		justify-content: center;
		align-items: center;
		height: 100%;
		font-size: 30upx;
		color: $font-color-dark;
		position: relative;
		&.current {
			color: $base-color;
			&:after {
				content: '';
				position: absolute;
				left: 50%;
				bottom: 0;
				transform: translateX(-50%);
				width: 120upx;
				height: 0;
				border-bottom: 4upx solid $base-color;
			}
		}
	}
	.p-box {
		display: flex;
		flex-direction: column;
		.yticon {
			display: flex;
			align-items: center;
			justify-content: center;
			width: 30upx;
			height: 14upx;
			line-height: 1;
			margin-left: 4upx;
			font-size: 26upx;
			color: #888;
			&.active {
				color: $base-color;
			}
		}
		.xia {
			transform: scaleY(-1);
		}
	}
	.cate-item {
		display: flex;
		justify-content: center;
		align-items: center;
		height: 100%;
		width: 80upx;
		position: relative;
		font-size: 44upx;
		&:after {
			content: '';
			position: absolute;
			left: 0;
			top: 50%;
			transform: translateY(-50%);
			border-left: 1px solid #ddd;
			width: 0;
			height: 36upx;
		}
	}
}

/* 分类 */
/* 分类 top: var(--window-top)*/
	.cate-mask {
		position: fixed;
		left: 0;
		top: var(--window-top);
		bottom: 0;
		width: 100%;
		background: rgba(0, 0, 0, 0);
		z-index: 95;
		transition: .3s;

		.cate-content {
			width: 630upx;
			height: 100%;
			background: #fff;
			float: right;
			transform: translateX(100%);
			transition: .3s;

			.t-box {
				display: flex;
				flex-direction: row;
				justify-content: space-between;
				align-items: center;
				background-color: #f4f4f4;
				font-size: 30upx;

				.t-b {
					font-size: $font-base;
					padding: 20rpx 30rpx;
				}

				.t-s {
					font-size: $font-base;
					padding: 20rpx 30rpx;
				}
			}
		}

		&.none {
			display: none;
		}

		&.show {
			background: rgba(0, 0, 0, .4);

			.cate-content {
				transform: translateX(0);
			}
		}

		&.shows {
			.cate-content {
				transform: translateX(0);
			}
		}
	}

	.cate-box {
		display: flex;
		flex-direction: column;
		margin-top: 30rpx;
		height: 88%;
		bottom: 120rpx;

		.title {
			font-size: $font-lg;
			color: $font-color-dark;
			font-weight: 700;
			margin: 40rpx;
		}

		.nav {
			display: flex;
			flex-direction: row;
			justify-content: space-between;
			align-items: center;
			padding: 20rpx 40rpx;
			margin: 20rpx 0rpx;
		}

		.subtitle {
			font-size: $font-base;
			color: $font-color-dark;
			font-weight: 700;
		}

		.type-box {
			display: flex;
			flex-direction: row;
			flex-wrap: wrap;
			justify-content: space-between;
			width: 100%;
			padding: 0rpx 40rpx;

			.type-item {
				font-size: $font-base;
				color: $font-color-dark;
				margin-top: 30rpx;
				text-align: center;
				line-height: 70rpx;
				width: 250upx;
				height: 70rpx;
				background-color: #F4F4F4;
				border-radius: 50rpx;
				text-align: center;
			}
		}

		.price-box {
			display: flex;
			flex-direction: row;
			justify-content: space-between;
			margin: 40rpx 40rpx 0rpx 40rpx;

			.price-input {
				font-size: $font-sm +2upx;
				color: $font-color-dark;
				width: 250upx;
				height: 70rpx;
				background-color: #F4F4F4;
				border-radius: 50rpx;
				text-align: center;
			}
		}
	}

	.cate-list {
		display: flex;
		flex-direction: column;
		height: 100%;
		padding-bottom: 110upx;

		.cate-flow {
			display: flex;
			flex-direction: row;
			flex-direction: row;
			flex-wrap: wrap;
			padding-left: 30upx;
			margin: 15rpx 0rpx;
			height: 100%;

			.cate-item {
				text-align: center;
				width: 180upx;
				height: 60rpx;
				line-height: 60rpx;
				vertical-align: middle;
				background-color: #F4F4F4;
				border-radius: 50rpx;
				margin: 15rpx 20rpx 15rpx 0rpx;
				font-size: 28upx;
				color: #555;
				position: relative;
			}

			.active {
				color: $base-color;
				background-color: #F4F4F4;
				border: 1px solid $base-color;
			}
		}

		.cate-item-p {
			display: flex;
			align-items: center;
			text-align: center;
			padding-left: 30upx;
			height: 90rpx;
			font-size: 28upx;
			color: #555;
			position: relative;
			.active {
				color: $base-color;
			}
		}

		.two {
			height: 64upx;
			color: #303133;
			font-size: 30upx;
		}


	}

/* 商品列表 */
.goods-list {
	display: flex;
	flex-wrap: wrap;
	padding: 0 30upx;
	background: #fff;
	.goods-item {
		display: flex;
		flex-direction: column;
		width: 48%;
		padding-bottom: 40upx;
		&:nth-child(2n + 1) {
			margin-right: 4%;
		}
	}
	.image-wrapper {
		width: 100%;
		height: 330upx;
		border-radius: 3px;
		overflow: hidden;
		image {
			width: 100%;
			height: 100%;
			opacity: 1;
		}
	}
	.title {
		font-size: $font-lg;
		color: $font-color-dark;
		line-height: 80upx;
	}
	.price-box {
		display: flex;
		align-items: center;
		justify-content: space-between;
		padding-right: 10upx;
		font-size: 24upx;
		color: $font-color-light;
	}
	.price {
		font-size: $font-lg;
		color: $uni-color-primary;
		line-height: 1;
		&:before {
			content: '￥';
			font-size: 26upx;
		}
	}
}
</style>
